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A promising material for cold cathodes creation are carbon films with both acceptable emission properties and satisfactory adhesion to the substrate. It is known that inclusions of metallic elements (chromium, titanium, etc.) improve the adhesion of the carbon film to the substrate. One of the methods for producing coatings based on carbon and titanium is electric arc spraying of a Ti/C composite cathode in an argon atmosphere. The disadvantage of this method is the presence in the total plasma flow of carbon microparticles, which are sources of structural defects in the growing film. Magnetic separation of carbon plasma solves the above problem. In this work, composite metal-carbon films were obtained by simultaneous electric arc spraying of graphite in a magnetic field and of titanium from two evaporators. The composition of the films was studied by Raman spectroscopy (RS) and X-ray photoelectron spectroscopy (XPS). It has been established that the samples obtained are composite films consisting of graphite nanoparticles, TiC nanoclusters or TiC, titanium oxides, and titanium carbide TiC Ncompounds.
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The process of the film oxidation of graphene, containing one and several layers, under the influence of UV irradiation structure in water vapor has been investigated. The regularity has been revealed and the difference in topography variation, as well as in the optical properties of grapheme, having a different number of layers, has been demonstrated. The possibility of the surface functionalization with modification of the energy structure of graphene has been revealed. The differences in the mechanisms of UFO oxidation of monolayer, multilayer and few-layered graphene have been analyzed. The correlation of the topographic defects of the graphene material properties and of the structural defects, observed on Raman scattering of light spectra, has been demonstrated.
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